Have a couple Roku streaming stick and having trouble with buffering messages appearing. The roku network test shows signal strength and speed but doesn't show more detail such as latency or jitter. I am not sure if the issue is in my local network or my ISP but guessing they are local. I switched to 5 GHz band and think that may fix the buffering issue. I have quite a few things on my 2.4 GHz band - nothing high bandwidth but still thinking that will help. Also found out Roku will send out a free HDMI extender (go.roku.com/hdmi) and think that may help. The TV screen is almost directly between the router and the stick. I looked into wired as I got adapters for fire sticks that helped and some 3rd parties make wired adapters that work with some Roku devices but not with my model. Just thought I would post the info if it is useful to others.